Tire-building machine



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urrsn STATES,

WILLIAM C. srnvnns, or AKRON, OHIO, AssIGNoR 'ro 'rn nrmns'ronn TIRE ANDPTTBBEE COMPAN or AKRON, oHIo, A CORPORATION OF OHIO.

TIRE-BUILDING MACHINE.

Application filed October 1, 1918. Serial No. 256,429.

T 0 all whom it may concern Be it known that I, \VILmnr C. S'rnvnNs, acitizen of the United States, residing at Akron. in the county ofSummit, State of Ohio, have invented certain new and useful Improvementsin Tire-Building Machines, of which the followingis a specification.

This invention relates to a new and improved machine for the manufactureof that portion of a pneumatic tire known as the tire carcass, composedof a plurality of layof fabric which are stretched over an annular coreand shaped to the sides thereof by the machine. Numerous machines havebeen developed for accomplishing the building of the tire, but it is thepurpose of the present invention to improve upon the machines in use atthis time with a view to rendering the operation of building a tire asnearly automatic as possiblmthus eliminating the human factor in theproduction, making a product which is substantially uniform. It is alsoa purpose to speed up the production of tires and to enable them to beturned out more rapidly than has been possible with any machine known tome.'

Other objects of the invention are to improve the mechanism foradvancing the spinning roller over the side of the core, and to causethe spinning roller in its movement over the side of the core to tollowthe shape of the core with accuracy. and in shapingthe fabric over thebead to follow the contour of the head and conforn'i the fabric aboutthe heel and in the underside thereof. It is also an object to cause thestitchers to automatically return to their positions when the work isfinish'edf A further object is to improve the trimming mechanism so thatthis operation may he done. more rapidly and accurately than heretofore.

It is also a purpose of this invention to so construct a tire buildingmachine tha the different operations are carried out at differentstations, each of which may be the work of asingle operator, so thateach operator may become adept in the particular step in tiremanufacture, 'and the work will be per formed more rapidly andaccurately. The fabric feeding and stretching mechanism is also improvedand the bead-placing operation has been simplified.

For the sake of rendering further discussion of the machine more easilycomprehensible, it will be understood that it comprises proper drivingconnections for the cores inv their severalpositions and mechanism torevolve the turntable step by step. Eachchuck is provided with a portionof the bead placing mechanism while at one point or station is mounted asecond bead placing device a stationary framework on which is mountedadapted to be brought into co-operation with each core in turn. Mountedon the stationary framework at opposlte pomts, are two sets of stitchingor spinning mechanisms with means for advancing them over the core andat another point is mounted a trimming device. While there are shownfour core holding chucks and four stations at which the severaloperations take place, this number may be increased or diminished withinthescope of the invention.

As shown, there are four stations oroperations in the manufactureof thetire. At the first station the finished carcass is trimmed andinspected, the core removed and a new core put in its place, at thesecond station the first plies, or those that go under the bead areapplied to the core and stitched in place, at. the third station thebeads are applied, and at the fourth station the final plies over thebead are put in position and stitched to the core and around the bead.

These and other objects will be apparent to those skilled in the art,and it is understood that changes and modifications may be made withoutsacrificing any of the benefits of the invention or departing from itsscope.

In the drawings accompanying this appli cation there is shown one formwhich the machine may assume, many of the larger views omitting certainparts for the sake of clearness.

Fig. l is a side elevation of the machine looking in the direction ofthe fabric applying mechanism.

Fig. 2 is a side elevation looking'in the direction at right angle toFig. 1 the stationary table or platform and the turntable being insection.

Fig. 3. is a plan View of the machine.

